Noun Suffices (er, or, ian, ist)

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Across
  1. 3. a person who speaks
  2. 5. a person who survives
  3. 6. a person who makes art
  4. 8. a person who works in the library
  5. 10. a person who gets to the end of a competition
  6. 11. a person who travels
Down
  1. 1. a person who believes
  2. 2. a person who studies history
  3. 3. a person who is special at something
  4. 4. a person sings
  5. 7. a person who guards
  6. 9. a person who creates
  7. 12. a person who visits